Table 1 Analytical parameters and validation results of the determination of PAR and IBU by the proposed methods

Linearity (μg/mL)

2–20

2–50

2–20

2–50

2–20

2–50

Slope

0.0538

0.1267

0.5544

0.3916

318.22

0.1949

Standard error of the slope

0.00067

0.00084

0.00176

0.00107

3.770

0.000354

Intercept

0.009016

0.1203

0.0318

− 0.0114

108.66

0.5010

Standard error of intercept

0.001722

0.02372

0.01096

0.00091

50.507

0.01177

Standard deviation of residuals from line

0.01033

0.03782

0.01637

0.00109

57.851

0.01122

Accuracy (mean ± SD)

99.72 ± 1.71

100.11 ± 0.53

99.64 ± 0.803

99.97 ± 0.641

100.21 ± 1.24

100.56 ± 0.36

Intraday precision (RSD%)^a

0.14

0.42

0.36

0.57

0.44

0.75

Interday precision (RSD%)^b

0.57

0.45

0.78

0.64

1.21

1.04

LOD

0.63

0.985

0.097

0.01

0.59

0.189

LOQ

1.537

1.985

0.295

0.0278

1.81

0.575